JP2002239021A - Safety belt device for work at elevated spot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety belt device for work at an elevated spot by which it is surely and seriously alarmed that the hook of a lifeline is forgotten to be hooked only in the really dangerous case that a worker wearing a safety belt (body belt) is at a high spot by eliminating the alarm lessening effects like the one issued even in an actually non-dangerous case. SOLUTION: This safety belt device for the work at the elevated spot is provided with at least the body belt 10 freely attachably and detachably worn by the worker, the lifeline 20 attached to the body belt 10 capable of being freely supplied and the hook 30 attached to the lifeline 20 and safety in the work at the elevated spot is secured by hooking the hook 30 to a master rope or the like. The device is provided with a height sensor for detecting the height position of the body belt 10 and an alarm means for issuing the alarm in the case that the hook 30 is not hooked even when the height sensor detects s fixed reference height or more in the state where the worker wears the body belt 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety belt device for work at height, which is worn by a worker working at height for safety.

[0002]

2. Description of the Related Art Conventionally, in order to ensure the safety of workers who work at heights, wearing of a safety belt is required by the Labor Standards Law. Regarding the safety belt, for example, Japanese Utility Model Registration No. 3051851 discloses that when a worker wears a safety belt for working at a high place, a pressure sensor turns on a power of an alarm device, and thereby an alarm which prompts use of a lifeline. Is disclosed. Also, JP-A-11-2672
No. 37 discloses a device that issues a warning when a hook of a lifeline is not hooked on a parent line.

[0003]

However, in the above-mentioned prior art, when the safety belt is not worn or when the hook of the lifeline is not hooked on the parent line or the like, it is determined whether the worker is at a high place. Since the warning is issued regardless of whether the warning is given, when the worker is in a low place, there is still a problem that it is not meaningful to the worker and is rather received as a troublesome and disturbing warning. For this reason, there is a problem that the worker makes a work so as not to sound the warning sound itself in order to avoid frequent troublesome warnings and the like even when the worker is not at a high place.
As a result, there was a problem that the high-altitude accident was not delayed.

Accordingly, the present invention solves the above-mentioned conventional disadvantages,
Eliminates warnings that may weaken the effect, even when they are not actually dangerous, and only when a worker wearing a safety belt (torso belt) is at high altitude and is really dangerous
An object of the present invention is to provide a safety belt device for working at heights that can surely and seriously warn of forgetting to hook a lifeline.

[0005]

A safety belt device for working at a high place according to the present invention which solves the above-mentioned problems is provided with a trunk belt detachably worn by an operator, and attached to the trunk belt so as to be able to be fed out. A safety belt device for high-place work, comprising at least a lifeline and a hook attached to the lifeline, wherein the hook is hooked on a parent line or the like to ensure safety in high-place work. A state in which the hook is hooked even though the height sensor has a height sensor that detects a height position of the belt and the worker is wearing a torso belt and the height sensor detects a certain reference height or more. The first feature is that a warning means is provided for giving a warning when there is no warning. Further, the safety belt device for aerial work according to the present invention, in addition to the first feature, the warning means may include
A second feature is that a warning is issued even when the height sensor indicates less than a certain minimum distance. Further, in the safety belt device for aerial work according to the present invention, in addition to the above first or second feature, the warning means may be configured such that when the height sensor detects a height equal to or higher than a certain reference height, the lifeline is at a certain A third feature is that a warning is issued if the hook is not extended beyond the extended length, regardless of whether the hook is hooked or not. Further, the safety belt device for aerial work according to the present invention, in addition to any one of the above first to third features, the warning means includes an obliquely high distance sensor for detecting a diagonally downward distance in addition to the height sensor. Even if the height sensor does not detect a fixed reference height or more, the hook height distance sensor detects a certain reference slope height or more, and if the hook is not hooked, The fourth feature is that a warning is issued. Further, in the safety belt device for aerial work according to the present invention, in addition to any one of the first to fourth features, the warning means includes a wearing switch for turning on a power supply when the worker wears the trunk belt. Is a fifth feature.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing a state in which a worker wears a safety belt device for aerial work according to an embodiment of the present invention, FIG. 2 is a front view of a safety belt device for aerial work according to an embodiment of the present invention, 3 is a bottom view of the safety belt device for working at a high place according to the embodiment of the present invention, FIG. 4 is a cross-sectional view of the storage case, FIG. 5 is a block diagram of alarm means, and FIG. 6 is a front view of a hook. 7 is a cross-sectional view of a main part of the hook, FIGS. 8 and 9 are diagrams illustrating the operation of the device according to the embodiment, and FIG. 10 is a flowchart illustrating a control operation of an alarm unit of the device according to the embodiment. 11 and 12 are diagrams for explaining other embodiments of the present invention.

Referring first to FIGS. 1 to 3, a safety belt device for working at height according to the present invention comprises a trunk belt 1 worn by an operator.
0 is provided. A lifeline 20 is attached to the torso belt 10, and a hook 30 is attached to a tip of the lifeline 20. A buckle 11 is provided on the torso belt 10.
Is provided so that the worker can detachably wear the torso belt 10 on the waist and adjust the degree of tightening.

The lifeline 20 is composed of a flat string having sufficient strength, such as a strap, or a rope or other string, and is provided in a storage case 40 attached to the torso belt 10.
It is configured such that it can be fed out and wound up freely. The storage case 40 is provided with a winding means 21 for winding the lifeline 20 described later. A shock absorber 22 for abruptly extending the lifeline 20 is attached to the trunk belt 10.
The hook 30 is a means to be hooked on a rope called a master rope P, a metal pipe, a metal rod, or the like in order to prevent the worker from falling from a high place. When not in use, the hook 30 can be stored in a bag 50, a metal fitting, or the like attached to the trunk belt 10.

Referring to FIG. 4, the storage case 40 is provided with a winding means 21 for the lifeline 20 and a warning means 60. The winding means 21 and the warning means 60 need not necessarily be provided in the same storage case 40, but may be provided in separate cases. The winding means 21 allows the worker to freely unwind the lifeline 20 manually when necessary, while releasing the stopper (not shown) during winding to remove the storage case 4.
It is configured so that it is automatically wound within 0.

Referring to FIG. 5, the warning means 60 includes a power supply 61, a wearing switch 62, a control unit 63, and a height sensor 6.
4. At least a hook sensor 65 and a speaker 66 are provided. The power supply 61 supplies power to each part of the warning means 60, and may be, for example, a dry battery or a rechargeable battery. As for the power supply 61, a battery check display unit indicating the power consumption state may be provided. The wearing switch 62 of the alarm unit 60 is a switch that allows the supply of power from the power supply 61 to each unit of the alarm unit 60. The switch is turned on when the worker wears the torso belt 10, and when the operator removes the torso belt 10, The switch turns off. The wearing switch 62 is, as shown in FIG.
, So that when the worker wears the torso belt 10, the wearing switch 62 is turned on.
The switch can be turned on by being pressed by the worker's body via the zero. Of course, the wearing switch 62 may be arranged at the buckle 11 of the torso belt 10, and the switch may be turned on by inserting the end of the torso belt 10 into the buckle 11. In other words, the wearing switch 62 only needs to be configured so as to be turned on when the torso belt 10 is worn by an operator, and its specific configuration may be variously configured using a well-known proximity switch or other switches. Can be.

The control section 63 of the warning means 60 is composed of a microcomputer or the like in which software is built, receives information from the height sensor 64 and the hook sensor 65, performs arithmetic processing in accordance with the built-in control program, Speaker 66
Is instructed to generate a predetermined warning sound or warning sound. The height sensor 64 of the warning unit 60 includes a power supply 61.
Is a sensor that detects the height of the trunk belt 10 worn by the worker when the switch is on. By detecting the height of the torso belt 10, the height of the worker from the ground or the floor is detected. The height sensor 64 is, for example, a distance sensor using sound waves such as ultrasonic waves, light such as lasers, radio waves, and other electromagnetic waves, and the height sensor 64 is provided in a state where the body belt 10 is worn by an operator. Attach so that the transmission source 64a faces downward. That is, for example, FIG.
As shown in the figure, the height sensor 64 is provided in the storage case 40, and the transmitted wave for detection (sound wave, light, radio wave, etc.) is provided.
Of the transmission case 64a faces downward through the partially transparent lower wall 41, faces downward through an opening provided in the lower wall 41, or projects downward from the lower wall 41 of the storage case 40. Deploy to Thus, the height sensor 64
Is arranged so that the transmission source 64a faces downward, it is possible to detect the height of the place where the worker is located from the ground or floor. The detected height data is stored in the control unit 6.
Sent to 3.

The hook sensor 65 is attached to the hook 30, detects whether the hook 30 is hooked on a master rope P such as a rope, a metal tube, a metal rod, or the like. To send to. For example, as shown in FIG. 6 and FIG. 30 is hung on the parent rope, so that the spring 65
The two switch pieces 65a and 65b are configured to be in contact with each other against C. Of course, the specific configuration of the hook sensor 65 is not particularly limited to the above configuration as long as it can detect whether or not the hook 30 is hooked.

The speaker 66 is for giving a warning, and the warning is made by voice, sound, or the like. Here, the warning is a concept including a warning in addition to a literal warning.

When the operator wears the torso belt 10 provided with the above warning means 60, the wearing switch 62 is turned on, and the electric power from the power supply 61 is transmitted to the control unit 63 and other parts of the warning means 60. The alarm means 60 is supplied, and the height sensor 64 and the hook sensor 65 are activated. As a result, the height of the worker (body belt 10) is detected by the height sensor 64, the state of the hook 30 is detected by the hook sensor 65, and the data or information thereof is sent to the control unit 63. As shown in FIGS. 8 and 9, when the worker climbs on a stepladder, a work platform, or the like, the distance from the ground or floor where the worker is located, that is, the height, is equal to a predetermined constant reference height Ls, For example, when the distance is 1.8 m or more, the control unit 63 issues a warning through the speaker 66. At this time, when the hook 30 is hooked on the master rope P by the information from the hook sensor 65 (actually, the hook sensor 65 (When the pair of switch pieces 65a and 66b are in contact with each other), no warning is issued because safety measures have already been taken. On the other hand, when the hook 30 is not hooked on the master rope P even though the height is not less than the reference height Ls, a warning is actually issued through the speaker 66.

Since the height sensor 64 should normally detect a certain height or more when the torso belt 10 is worn by an operator, the height sensor 64
If the detected value is less than or equal to the predetermined minimum distance Lx, the control unit 63 determines that the height sensor 64 is preventing normal detection by an obstacle or the like, and the warning is issued through the speaker 66. The control unit 63 can be configured to issue another warning. Thus, for example, an operator blocks the front of the height sensor 64, and the actual reference height L
It can be prevented that it is not detected despite being at least s. The minimum distance Lx can be set to, for example, several centimeters to ten and several centimeters by an experiment in advance.

Referring to FIG. 10, an example of the control operation of the alarm means 60 will be described. Now, when the worker wears the torso belt 10 (Yes in step S1), the wearing switch 62 is turned on and the power supply 51 is turned on (step S2). In this state, if the height sensor 64 detects a certain reference height Ls or more (Yes in step S3), the control unit 63 further determines whether or not the hook sensor 65 has detected the state in which the hook 30 is hooked. It is determined (step S4), and if it is not hooked (NO in step S4),
A warning that the hook should be hooked is issued through the speaker 66 (step S5). For the warning, one or more types of voices and sounds are stored in the control unit 63 in advance, and the type of voice or sound is changed in accordance with, for example, the elapsed time from the start of the warning or the number of times of the warning. Is also good. The wording or the like of the warning sound is not particularly limited as long as it conforms to the purpose. Of course, even when the hook 30 is hooked in the step S4 (Yes in the step S4), a sound for confirming whether the hook 30 is surely hooked on the master line P may be played once. . On the other hand, in step S3, the height sensor 6
4 does not detect the reference height Ls or more,
When the height sensor 64 detects the distance equal to or smaller than the minimum distance Lx (Yes in step S6), the controller 64
A warning is issued through step 6 that the height sensor 64 has an obstacle (step S7). Alternatively, a warning or the like that the height sensor 64 has not normally detected is issued. The warning can be given by voice, sound or the like. Naturally, this warning is different from the warning in step S5.

In the above configuration, in a state where the hook sensor 65 detects the hook 30 being hooked, no warning is issued even when the height sensor 64 detects the reference height Ls or more. I have. However, a problem arises when the hook sensor 65 is out of order, or the hook sensor 65 is in a state of being hooked even though the hook 30 is not actually hooked. Therefore, as another additional embodiment of the present invention, FIG.
As shown in FIG. 7, a lifeline sensor 67 for detecting the extension length of the lifeline 20 is added as an element of the warning means 60. If the lifeline sensor 67 does not detect a predetermined reference extension length Ms or more, for example, Hook sensor 65 is hook 3
Even if the hooking of the hook 30 is detected (step S4 is YES in the flowchart of FIG. 10), it is determined that the hook 30 is not actually hooked on the lifeline P or the like, and a warning is issued (FIG. 10). 10 (similar to step S5 in the flowchart of FIG. 10). In the above, the lifeline sensor 67 is, for example, a sensor for detecting how much the take-up reel in the winding means 21 of the lifeline 20 has rotated from a winding reference position. The control unit 63 determines the lifeline 20 based on the detected rotation amount. Can be configured to calculate the payout length. The reference feeding length Ms is determined in advance by an experiment, and an appropriate length such as, for example, about several tens of centimeters is determined and stored in the control unit 63.

In the above description, the height sensor 64 is provided as a component of the warning means 60, and the height sensor 64 is
The distance (height) to the ground or floor where the worker is located is detected by pointing the torso belt 10 downward while being worn by the worker. FIG. 11, FIG.
As shown in FIG. 2, the area directly below the worker is not high, such as when the worker is on a workbench at a high place or at a high position on the stairs. There are cases where there is no floor etc. and it is high. Such a place can be regarded as a dangerous high place where the worker may fall. Therefore, as another additional embodiment of the present invention, as shown in FIG.
As an element of 0, an oblique high distance sensor 68 for detecting an obliquely downward distance is added in addition to the height sensor 64, and when the oblique high distance sensor 68 detects a constant reference oblique height Ly or more. May be configured to issue a warning even if the height sensor 64 detects a value less than the reference height Ls unless the hook 30 is hooked. The oblique height distance sensor 68 can be constituted by a distance sensor using a sound wave such as an ultrasonic wave, light such as a laser, a radio wave, or another electromagnetic wave, similarly to the height sensor 64. It is mounted so that the transmission source of the oblique high-distance sensor 68 faces obliquely downward, for example, 45 degrees obliquely downward when worn by an operator. Alternatively, it is mounted so that the distance obliquely downward can be detected. The reference diagonal height distance Ly can be determined in advance by experimentation and stored in the control unit 63. For example, the reference height Ls is set to 1.
If it is 8 meters and the measurement direction is 45 degrees downward,
It can be 2.5 meters. Of course, the oblique high distance sensor 68 does not need to be capable of accurately measuring the distance itself. A sensor that can determine whether the slope height distance is larger or smaller than the reference slope height Ly may be used. Further, the oblique high distance sensor 68 may be configured to be able to be switched to a switch-off state as needed.

[0019]

According to the safety belt device for aerial work according to the first aspect of the present invention, a trunk belt detachably worn by an operator and a trunk belt attached to the trunk belt are provided. At least a lifeline attached and made freely extendable, and a hook attached to the lifeline, and a safety for high-place work, wherein the hook is hooked on a parent line or the like to ensure safety in high-place work. A belt device, having a height sensor for detecting a height position of the trunk belt, wherein the height sensor detects a certain reference height or more in a state where the worker wears the trunk belt. When the hook is not hooked, a warning means is provided so as to give a warning, so that the worker wearing the torso belt detects whether or not the person is at a high place, and uses a lifeline. To detect whether or not Only it can be carried out reliably warning if you do not have a lifeline to that. Therefore, according to the safety belt device for aerial work according to the first aspect, a warning to reduce the effect, which is performed even when it is not actually dangerous, is eliminated and the safety belt (body belt) is worn. Only when the worker is at a high place and is really dangerous, he / she can be warned of the forgetting to hook the lifeline hook securely and seriously. (An operation of hanging on a rope). Claim 2
According to the safety belt device for aerial work described in (1), in addition to the effect of the configuration described in the above (1), the warning means gives a warning even when the height sensor indicates less than a certain minimum distance. With the configuration, when the height sensor is obstructed by an obstacle or the like and is not operating normally, it is possible to eliminate such a state by a warning, so that the normal operation of the height sensor is ensured. As a result, necessary safety warnings can be issued more reliably when necessary. According to the safety belt device for aerial work according to the third aspect, in addition to the effect of the configuration according to the first or second aspect, in addition to the warning means, the height sensor detects that the height sensor is equal to or higher than a predetermined reference height. If the lifeline has not been extended beyond a certain standard extension length while
Because the warning is issued regardless of whether the hook is hooked, the hook is actually hooked even though it is not hooked on the parent rope. It is possible to reliably eliminate the situation in which no action is taken, and it is possible to issue a necessary safety warning when necessary. Claim 4
According to the safety belt device for aerial work described in (1), in addition to the effect of the configuration according to any one of claims 1 to 3, the warning means detects a diagonally downward distance in addition to the height sensor. Even if the height sensor does not detect a certain reference height or higher, the hook is hooked even if the height sensor does not detect a certain reference height or higher. It is configured to give a warning when it is not in the upright position, so the area directly below the operator is not high, but the area slightly below the area underneath seems to be a high place without a floor etc. In such a case, it is possible to reliably warn the worker of the use of the lifeline, and to further enhance the safe work of the worker. According to the safety belt device for working at height according to the fifth aspect, in addition to the effect of the configuration according to any one of the first to fourth aspects, the warning means is provided in a state where the worker wears the trunk belt. The warning means is activated only when the worker is wearing the torso belt, so that unnecessary power consumption can be suppressed and the warning means can be suppressed while the torso belt is being worn. The life of the power supply can be substantially extended.

[Brief description of the drawings]

FIG. 1 is an external view showing a state in which a worker wears a safety belt device for working at heights according to an embodiment of the present invention.

FIG. 2 is a front view of the safety belt device for working at a high place according to the embodiment of the present invention.

FIG. 3 is a bottom view of the safety belt device for aerial work according to the embodiment of the present invention.

FIG. 4 is a sectional view of a storage case.

FIG. 5 is a block wiring diagram of an alarm unit.

FIG. 6 is a front view of a hook.

FIG. 7 is a sectional view of a main part of the hook.

FIG. 8 is a diagram for explaining the operation of the device according to the embodiment.

FIG. 9 is a diagram illustrating the operation of the device according to the embodiment.

FIG. 10 is a flowchart illustrating a control operation of an alarm unit of the device according to the embodiment.

FIG. 11 is a diagram illustrating another embodiment of the present invention.

FIG. 12 is a diagram illustrating another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 trunk belt 11 buckle 20 lifeline 21 winding means 22 shock absorber 30 hook 40 storage case 50 bag 60 warning means 61 power supply 62 mounting switch 63 control unit 64 height sensor 64a transmission source 65 hook sensor 65a switch piece 65b switch piece 65c spring 66 Speaker 67 Lifeline sensor 68 High-distance sensor P Parent line

Claims (5)

[Claims] 1. A trunk belt detachably worn by an operator, a lifeline attached to the trunk belt and capable of being extended, and a hook attached to the lifeline. It is a safety belt device for high place work that secures safety in high place work by being hooked on etc., has a height sensor that detects the height position of the trunk belt, A warning means is provided for issuing a warning when the hook is not hooked even though the height sensor detects a certain reference height or more in a worn state. Safety belt device for working at height. 2. The safety belt device for aerial work according to claim 1, wherein the warning means is configured to give a warning even when the height sensor indicates less than a certain minimum distance. 3. The warning means determines whether the hook is hooked if the lifeline has not been extended over a predetermined reference extension length while the height sensor has detected the predetermined reference height or more. The safety belt device for working at heights according to claim 1 or 2, wherein a warning is issued regardless of the condition. 4. The warning means includes an oblique height sensor for detecting an obliquely lower distance in addition to the height sensor. Even when the height sensor does not detect a height equal to or higher than a predetermined reference height, the warning means may include the oblique height sensor. When the distance sensor detects a distance equal to or higher than a predetermined reference slope height, a warning is issued when the hook is not hooked.
4. The safety belt device for working at heights according to any one of the above items 3. 5. The safety belt device for aerial work according to claim 1, wherein the warning means has a wearing switch for turning on the power when the worker wears the trunk belt.